The Chairman of the Polio Victims Trust Association Aminu Ahmed poses with local tricycles fabricated by polio victim members on display for sale along the road in Kano, northwest Nigeria, on April 21, 2017. - The World Health Organization said 116 million children are to receive polio vaccines in 13 countries in west and central Africa as part of efforts to eradicate the disease on the continent. "The synchronised vaccination campaign, one of the largest of its kind ever implemented in Africa, is part of urgent measures to permanently stop polio on the continent," the WHO said. (Photo by PIUS UTOMI EKPEI / AFP)
